Pressure Converter
Convert between common pressure units instantly. Perfect for engineering, weather, automotive, and scientific applications.
How to Use the Pressure Converter
Converting between pressure units is quick and straightforward:
- Enter a numeric value in the input field. Decimals are supported for precision.
- Select the source unit from the dropdown (Pascal, Bar, PSI, ATM, mmHg, or inHg).
- View all conversions in the results table. Results appear instantly as you type.
- Click Copy next to any result to copy the value to your clipboard.
About Pressure Units
Pressure is the force applied per unit area. The SI unit is the Pascal (Pa), named after mathematician Blaise Pascal. In everyday use, many different pressure units exist for different fields. Bar and kilopascal are common in meteorology and engineering. PSI (pounds per square inch) is standard in the United States for tire pressure and hydraulics. Atmospheres (atm) provide an intuitive reference to sea-level air pressure.
Medical professionals often use mmHg (millimeters of mercury) for blood pressure, while aviators use inHg (inches of mercury) for altimeter settings. Key relationships: 1 atm = 101,325 Pa = 1.01325 bar = 14.696 PSI = 760 mmHg = 29.9213 inHg. Understanding these conversions is essential for HVAC, automotive, weather forecasting, and medical applications.
Frequently Asked Questions
One bar equals approximately 14.5038 PSI. To convert bar to PSI, multiply the bar value by 14.5038. One bar is also equal to 100,000 Pascal.
Standard atmospheric pressure (1 ATM) equals 101,325 Pascal, 1.01325 bar, 14.696 PSI, 760 mmHg, or 29.9213 inHg. It is defined as the average pressure at sea level.
For practical purposes, mmHg and Torr are identical. One Torr equals exactly 1/760 of a standard atmosphere. The mmHg unit originally referred to the height of a mercury column, and 1 mmHg = 133.322 Pascal.
Inches of mercury (inHg) is commonly used in aviation (altimeter settings) and weather reporting in the United States. Standard pressure is 29.92 inHg.